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|
# -*- coding: utf-8 -*-
from __future__ import absolute_import
from .exc import ThriftLexerError
literals = ':;,=*{}()<>[]'
thrift_reserved_keywords = (
'BEGIN',
'END',
'__CLASS__',
'__DIR__',
'__FILE__',
'__FUNCTION__',
'__LINE__',
'__METHOD__',
'__NAMESPACE__',
'abstract',
'alias',
'and',
'args',
'as',
'assert',
'begin',
'break',
'case',
'catch',
'class',
'clone',
'continue',
'declare',
'def',
'default',
'del',
'delete',
'do',
'dynamic',
'elif',
'else',
'elseif',
'elsif',
'end',
'enddeclare',
'endfor',
'endforeach',
'endif',
'endswitch',
'endwhile',
'ensure',
'except',
'exec',
'finally',
'float',
'for',
'foreach',
'function',
'global',
'goto',
'if',
'implements',
'import',
'in',
'inline',
'instanceof',
'interface',
'is',
'lambda',
'module',
'native',
'new',
'next',
'nil',
'not',
'or',
'pass',
'public',
'print',
'private',
'protected',
'public',
'raise',
'redo',
'rescue',
'retry',
'register',
'return',
'self',
'sizeof',
'static',
'super',
'switch',
'synchronized',
'then',
'this',
'throw',
'transient',
'try',
'undef',
'union',
'unless',
'unsigned',
'until',
'use',
'var',
'virtual',
'volatile',
'when',
'while',
'with',
'xor',
'yield'
)
keywords = (
'namespace',
'include',
'void',
'bool',
'byte',
'i16',
'i32',
'i64',
'double',
'string',
'binary',
'map',
'list',
'set',
'oneway',
'typedef',
'struct',
'union',
'exception',
'extends',
'throws',
'service',
'enum',
'const',
'required',
'optional',
)
tokens = (
'BOOLCONSTANT',
'INTCONSTANT',
'DUBCONSTANT',
'LITERAL',
'IDENTIFIER',
) + tuple(map(lambda kw: kw.upper(), keywords))
t_ignore = ' \t\r' # whitespace
def t_error(t):
raise ThriftLexerError('Illegal characher %r at line %d' %
(t.value[0], t.lineno))
def t_newline(t):
r'\n+'
t.lexer.lineno += len(t.value)
def t_ignore_SILLYCOMM(t):
r'\/\*\**\*\/'
t.lexer.lineno += t.value.count('\n')
def t_ignore_MULTICOMM(t):
r'\/\*[^*]\/*([^*/]|[^*]\/|\*[^/])*\**\*\/'
t.lexer.lineno += t.value.count('\n')
def t_ignore_DOCTEXT(t):
r'\/\*\*([^*/]|[^*]\/|\*[^/])*\**\*\/'
t.lexer.lineno += t.value.count('\n')
def t_ignore_UNIXCOMMENT(t):
r'\#[^\n]*'
def t_ignore_COMMENT(t):
r'\/\/[^\n]*'
def t_BOOLCONSTANT(t):
r'\btrue\b|\bfalse\b'
t.value = t.value == 'true'
return t
def t_DUBCONSTANT(t):
r'-?\d+\.\d*(e-?\d+)?'
t.value = float(t.value)
return t
def t_HEXCONSTANT(t):
r'0x[0-9A-Fa-f]+'
t.value = int(t.value, 16)
t.type = 'INTCONSTANT'
return t
def t_INTCONSTANT(t):
r'[+-]?[0-9]+'
t.value = int(t.value)
return t
def t_LITERAL(t):
r'(\"([^\\\n]|(\\.))*?\")|\'([^\\\n]|(\\.))*?\''
s = t.value[1:-1]
maps = {
't': '\t',
'r': '\r',
'n': '\n',
'\\': '\\',
'\'': '\'',
'"': '\"'
}
i = 0
length = len(s)
val = ''
while i < length:
if s[i] == '\\':
i += 1
if s[i] in maps:
val += maps[s[i]]
else:
msg = 'Unexcepted escaping characher: %s' % s[i]
raise ThriftLexerError(msg)
else:
val += s[i]
i += 1
t.value = val
return t
def t_IDENTIFIER(t):
r'[a-zA-Z_](\.[a-zA-Z_0-9]|[a-zA-Z_0-9])*'
if t.value in keywords:
t.type = t.value.upper()
return t
if t.value in thrift_reserved_keywords:
raise ThriftLexerError('Cannot use reserved language keyword: %r'
' at line %d' % (t.value, t.lineno))
return t
|
